Download the latest version of your BIOS from your computer or motherboard manufacturer’s support site.

Rename the downloaded file to AMIBOOT.ROM. (NOTE: Please see paragraph 3 to make sure you pick the right name)

Copy the file to a floppy disk (or USB flashdrive).

Insert the floppy disk into the floppy drive.

Turn on the system.

The system should automatically access the floppy drive (indicator LED will light up). If no floppy access occurs, press Home to force update. Follow any on-screen instructions to restore the good BIOS from the floppy disk.

When the computer beeps four (4) times or a reboot prompt is displayed, you may remove the floppy disk.

Restart the computer.

Note: If a USB keyboard does not work, try using a PS/2 keyboard. Sometimes, taking out the CMOS battery to clear the configuration settings or resetting the CMOS jumper switch to clear the CMOS may help too. Only the BIOS file is needed. For AMI BIOS recovery, the floppy disk does not have to be bootable and no flash utility is required. This procedure is also applicable with USB drives on most newer systems that use AMI.

IMPORTANT: If you have an HP BIOS and the recovery method above was unsuccessful, please rename the recovery BIOS to HPBIOS.ROM and try again.

Please identify your BIOS type and try the procedure for your BIOS type. If it doesn’t work we’d recommend you take it into a nearby shop to have it serviced. (Either solder new chip on or order new motherboard).

Hi. This is my first post and last resort. I can’t get past a blue screen (BSOD)when Windows tries to start which states …The BIOS in this system is not fully ACPI compliant… I’ve researched this site and the web and can’t find an answer that works. I’d like to try to update the BIOS since it’s the original and I think it’s corrupted. There are 2 newer versions but they appear to require windows to run and I can’t boot into windows. My system is:

so i knoiw this is a stupid question but when you say rename the downloaded file, the one i downloased was a .zip archive, do you mean the actual downloaded file (the zip) or the extracted contents. Also inside the archive there is no file with a .rom extension and everywhere i look that seems to be the file that i need to fix my z77a-g45 booting again. something went wrong when i flashed the bios, i dont know what i did it the MSI way all the way through but now it wont even post, just infinite boot to post and reboot. funny tho if i put a jumper thingy on the display jumpers on the top left corner by the cpu, it actually tries to post but none of the display outputs show anything, my screen gets no signal from the HDMI VGA and the DVI

You will want to rename the file inside the downloaded ZIP that is the actual BIOS image. Usually easiest to tell which file is the BIOS image based on the file size (look for standard sizes like 1024kb, etc. (powers of 2))